20210222122220 has 24 divisors (see below), whose sum is σ = 45706194646224. Its totient is φ = 7462235860416.

The previous prime is 20210222122217. The next prime is 20210222122229. The reversal of 20210222122220 is 2222122201202.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20210222122192 and 20210222122201.

It is not an unprimeable number, because it can be changed into a prime (20210222122229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38865811514 + ... + 38865812033.

It is an arithmetic number, because the mean of its divisors is an integer number (1904424776926).

Almost surely, 2^{20210222122220} is an apocalyptic number.

20210222122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210222122220 is an abundant number, since it is smaller than the sum of its proper divisors (25495972524004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20210222122220 is a wasteful number, since it uses less digits than its factorization.

20210222122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77731623569 (or 77731623567 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20210222122220 its reverse (2222122201202), we get a palindrome (22432344323422).

The spelling of 20210222122220 in words is "twenty trillion, two hundred ten billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty".